165403616894 has 8 divisors (see below), whose sum is σ = 248129467320. Its totient is φ = 82693794456.

The previous prime is 165403616821. The next prime is 165403616923. The reversal of 165403616894 is 498616304561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3981164 + ... + 4022495.

It is an arithmetic number, because the mean of its divisors is an integer number (31016183415).

Almost surely, 2^165403616894 is an apocalyptic number.

165403616894 is a deficient number, since it is larger than the sum of its proper divisors (82725850426).

165403616894 is a wasteful number, since it uses less digits than its factorization.

165403616894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8013994.

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 165403616894 in words is "one hundred sixty-five billion, four hundred three million, six hundred sixteen thousand, eight hundred ninety-four".